Results 31 to 40 of about 202,849 (356)

Study on the Effect of Tooth Root Crack on Gear Body Stiffness and Coupling Stiffness between Adjacent Teeth

open access: yesJixie chuandong, 2022
Tooth root fatigue crack is one of the most common failure forms in the service process of gear transmission system, and it will threaten the safety of gear transmission systems or even the whole equipment.
Zaigang Chen, Yunsheng Zhi, Jieyu Ning
doaj  

Film and digital periapical radiographs for the measurement of apical root shortening [PDF]

open access: yes, 2012
Objectives: The aim of this study was to compare the accuracy and agreement of scanned film and digital periapical radiographs for the measurement of apical root shortening.
Bearn, David R.   +3 more
core   +1 more source

Immunomodulation stimulates the innervation of engineered tooth organ [PDF]

open access: yes, 2014
The sensory innervation of the dental mesenchyme is essential for tooth function and protection. Sensory innervation of the dental pulp is mediated by axons originating from the trigeminal ganglia and is strictly regulated in time. Teeth can develop from
Bécavin, Thibault   +5 more
core   +10 more sources

TOOTH ROOT BENDING STRESS CORRECTION ALGORITHM BASED ON VARIABLE PRESSURE ANGLE HOB (MT)

open access: yesJixie qiangdu, 2023
In order to solve the problem that the national standard cannot accurately calculate the bending stress of cylindrical helical gear with variable pressure Angle hob, a modified algorithm for calculating the bending stress of gear with variable pressure ...
XIAO Teng, HE ZeYin, RAN XiongTao
doaj  

Dynamic tooth loads and stressing for high contact ratio spur gears [PDF]

open access: yes, 1983
An analysis and computer program were developed for calculating the dynamic gear tooth loading and root stressing for high contact ratio gearing (HCRG) as well as LCRG.
Cornell, R. W., Westervelt, W. W.
core   +1 more source

Patient-centered endodontic outcomes: a narrative review. [PDF]

open access: yes, 2013
IntroductionRoot canal treatment (RCT) success criteria inform us of the path to bony healing and of prognostic factors, but tell little about how the patient perceives, feels, or values RCT.
Fayazi, Sara   +4 more
core   +3 more sources

Eco‐Fabricated Nanowave‐Textured Implants Drive Microtubule‐Assisted Nuclear Mechanotransduction and Chromatin Modification: Biophysical Priming for Osteogenesis and Bone Regeneration

open access: yesAdvanced Functional Materials, EarlyView.
Eco‐friendly nanowave‐textured implants produced via femtosecond laser fabrication enhance bone regeneration by orchestrating a precise mechanotransduction cascade. This nanotopography directs mesenchymal stem cell alignment and cytoskeletal organization, triggering changes in nuclear shape and chromatin acetylation that prime cells for osteogenesis ...
Bosu Jeong   +15 more
wiley   +1 more source

Barremian and Aptian (Cretaceous) sharks and rays from Speeton, Yorkshire, north-east England [PDF]

open access: yes, 2004
Bulk sampling of a number of horizons within the upper part of the Speeton Clay Type section has produced teeth and other remains of sharks and rays from several poorly studied horizons.
Applegate   +34 more
core   +1 more source

Supervariate Gel Transforms into Various Biominerals in Salt Solutions

open access: yesAdvanced Functional Materials, EarlyView.
It is revealed that common calcium‐based biominerals can form from a stable, non‐toxic ‘supervariate’ gel. This tunable gel selectively yields calcite or hydroxyapatite in carbonate/phosphate solutions, while CaCl₂ facilitates the formation of dihydrate calcium pyrophosphate, which converts to hydroxyapatite upon drying. These findings provide insights
Xinxue Tang   +12 more
wiley   +1 more source

Compliance and stress sensitivity of spur gear teeth [PDF]

open access: yes, 1983
The magnitude and variation of tooth pair compliance with load position affects the dynamics and loading significantly, and the tooth root stressing per load varies significantly with load position.
Cornell, R. W.
core   +1 more source

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